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--- a/README.md
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 # iOS Swift Tutorial: Guide to Using JSON Data from the Web
 
 If your app communicates with a web application, information returned from the server is often formatted as JSON. 
-By getting weather data from the darksky API you are going to learn how to retrieve and effectifly deal with JSON Data.
+By getting weather data from the darksky API you are going to learn how to retrieve and effectively deal with JSON Data.
 
 [Video on YouTube](https://youtu.be/_c0pAz3UPEs)